Zav's Stamina and Abilities

Addition

-new posture system. Everymobs have a posture. if you want change those numbers, you gotta create a datapack: you will need to create a json file with the name of the mobs and in  the file data/staminamod/entityposture. more info will be in github source code.

-When posture hits its limit( blue bar), you will be weak and slow. 

-parry deal posture damages instead of directly parrying them, you might need to parry once or more

-parry cooldown reduce

-add two new abilities: guard counter and shield blast.

-guard counter blocks attacks with weapon on hands and deal some posture damage to the attack and the some to the blocker as well. 

-some abilities will have some requirements and it will display if you are missing one.